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Details van artikel 2 van 12 gevonden artikelen
| Titel: |
Assessment of crop loss in peanut caused by Sclerotinia sclerotiorum, S. minor, and Sclerotium rolfsii in Argentina |
| Auteur: |
Marinelli, A. March, G. J. Rago, A. Giuggia, J. |
| Verschenen in: |
International journal of pest management |
| Paginering: | Jaargang 44 (1998) nr. 4 pagina's 251-254 |
| Jaar: |
1998-10 |
| Inhoud: |
Crop losses caused by Sclerotinia sclerotiorum (Lib.) de Bary and S. minor Jagger ('blight') and Sclerotium rolfsii Sacc. ('wilting') were evaluated in 41 commercial peanut fields ( Arachis hypogaea L.) located in the southern region of the peanut-producing area in the province of Cordoba, Argentina, during 1991, 1992, 1993 and 1994. Production losses were calculated using the following equation: PL = (AY/1.0 LP) AY where PL represents losses, AY the actual -yield and LP the proportion of losses. The actual yield is that obtained by the producer while proportional losses are equivalent to the percentage of dead plants (incidence). Incidence was evaluated along the arms of an X-shaped design before cropping. Each of the 100 samples evaluated was taken at regular intervals (namely, 25 samples in each X-arm) and consisted of 50 consecutive plants in the same row. The incidence of either disease was generally higher in fields in which the sequencing of crops was the same during the last 15 years. Furthermore, the incidence of 'blight' and 'wilting' was often higher in peanut crops where the preceding crop had been peanut, soybean ( Glycine max (L.) Merr.) or sunflower ( Helianthus annuus L.) than in peanut crops preceded by sorghum ( Sorghum bicolor (L.) Moench.), maize ( Zea mays L.), alfalfa ( Medicago sativa L.), lovegrass ( Eragrostis curvula L.) or grassland. In fields incorporated for agricultural production during the last 5 years, 'blight' ranged from 1% to 4%, and yield losses between 30 and 100 kg/ha. In fields in which the sequencing of crops has been the same during the last 15 years, 'blight' varied from 5% to 45%, and yield losses between 100 and 870 kg/ha. In fields incorporated for agricultrual production during the last 5 years, 'wilting' ranged from 3% to 6%, and yield losses between 70 and 130 kg/ha. Where the sequencing of crops has been the same during the last 15 years, 'wilting' ranged from 14% to 34%, and losses between 150 and 570 kg/ha. The fact that these diseases are becoming increasingly widespread, together with the losses caused by them throughout the peanut-growing region, allow them to be considered of major importance to the decrease of peanut yield. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 12 gevonden artikelen
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